On a recent flight, I accidentally left a Timothy Keller book called "The Reason for God" in the seatback in front of me. Now, let's pretend it was an Organic Cooking magazine instead. If someone on the next flight sat down and had some vague interest in cooking, they might have taken this as a sign from God that they were to read/explore the benefits of organic cooking.
But, no one's going to think "The Reason for God" was an accidental leave-behind. And likely, the person on the next flight is going to assume that I'm trying to silently solicit them.
How does this example effect how you might try to persuade people?